Mike Leigh encourages you to choose a person that you know to base your character on. You write a whole list of people that you know and you go through that list in great depth with him. And then he chooses one of those people from your list.

When I think of Marilyn Monroe, and achieving her sound, I think of having a rather large bust. I think of her physically and I am just able to create her sound, because her physicality was so much to do with her sound.